In fact, it was more like the movie of The Man Who Came To Dinner — I was still ... you would have a model for collagen, because at that time we knew that collagen had sequences Gly–Pro ...

Total and pericellular collagen were measured using picrosirius red staining. CD68+ cells (total macrophages) and CD163+ cells (M2-macrophages) were identified using immunohistochemistry.

To compensate, collagen supplementation has become a booming business. One aficionado is Bryan Johnson, the tech entrepreneur who has become a one-man experiment for how to prolong your life ...